1 /* crypto/rsa/rsa_lib.c */
2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
5 * This package is an SSL implementation written
6 * by Eric Young (eay@cryptsoft.com).
7 * The implementation was written so as to conform with Netscapes SSL.
9 * This library is free for commercial and non-commercial use as long as
10 * the following conditions are aheared to. The following conditions
11 * apply to all code found in this distribution, be it the RC4, RSA,
12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
13 * included with this distribution is covered by the same copyright terms
14 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
16 * Copyright remains Eric Young's, and as such any Copyright notices in
17 * the code are not to be removed.
18 * If this package is used in a product, Eric Young should be given attribution
19 * as the author of the parts of the library used.
20 * This can be in the form of a textual message at program startup or
21 * in documentation (online or textual) provided with the package.
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
26 * 1. Redistributions of source code must retain the copyright
27 * notice, this list of conditions and the following disclaimer.
28 * 2. Redistributions in binary form must reproduce the above copyright
29 * notice, this list of conditions and the following disclaimer in the
30 * documentation and/or other materials provided with the distribution.
31 * 3. All advertising materials mentioning features or use of this software
32 * must display the following acknowledgement:
33 * "This product includes cryptographic software written by
34 * Eric Young (eay@cryptsoft.com)"
35 * The word 'cryptographic' can be left out if the rouines from the library
36 * being used are not cryptographic related :-).
37 * 4. If you include any Windows specific code (or a derivative thereof) from
38 * the apps directory (application code) you must include an acknowledgement:
39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
53 * The licence and distribution terms for any publically available version or
54 * derivative of this code cannot be changed. i.e. this code cannot simply be
55 * copied and put under another distribution licence
56 * [including the GNU Public Licence.]
60 #include <openssl/crypto.h>
62 #include <openssl/lhash.h>
63 #include <openssl/bn.h>
64 #include <openssl/rsa.h>
65 #ifndef OPENSSL_NO_ENGINE
66 #include <openssl/engine.h>
69 const char *RSA_version="RSA" OPENSSL_VERSION_PTEXT;
71 static const RSA_METHOD *default_RSA_meth=NULL;
75 RSA *r=RSA_new_method(NULL);
80 void RSA_set_default_method(const RSA_METHOD *meth)
82 default_RSA_meth = meth;
85 const RSA_METHOD *RSA_get_default_method(void)
87 if (default_RSA_meth == NULL)
90 default_RSA_meth=RSA_null_method();
92 #if 0 /* was: #ifdef RSAref */
93 default_RSA_meth=RSA_PKCS1_RSAref();
95 default_RSA_meth=RSA_PKCS1_SSLeay();
100 return default_RSA_meth;
103 const RSA_METHOD *RSA_get_method(const RSA *rsa)
108 int RSA_set_method(RSA *rsa, const RSA_METHOD *meth)
110 /* NB: The caller is specifically setting a method, so it's not up to us
111 * to deal with which ENGINE it comes from. */
112 const RSA_METHOD *mtmp;
114 if (mtmp->finish) mtmp->finish(rsa);
115 #ifndef OPENSSL_NO_ENGINE
118 ENGINE_finish(rsa->engine);
123 if (meth->init) meth->init(rsa);
127 RSA *RSA_new_method(ENGINE *engine)
131 ret=(RSA *)OPENSSL_malloc(sizeof(RSA));
134 RSAerr(RSA_F_RSA_NEW_METHOD,ERR_R_MALLOC_FAILURE);
138 ret->meth = RSA_get_default_method();
139 #ifndef OPENSSL_NO_ENGINE
142 if (!ENGINE_init(engine))
144 RSAerr(RSA_F_RSA_NEW_METHOD, ERR_R_ENGINE_LIB);
148 ret->engine = engine;
151 ret->engine = ENGINE_get_default_RSA();
154 ret->meth = ENGINE_get_RSA(ret->engine);
157 RSAerr(RSA_F_RSA_NEW_METHOD,
159 ENGINE_finish(ret->engine);
177 ret->_method_mod_n=NULL;
178 ret->_method_mod_p=NULL;
179 ret->_method_mod_q=NULL;
181 ret->bignum_data=NULL;
182 ret->flags=ret->meth->flags;
183 CRYPTO_new_ex_data(CRYPTO_EX_INDEX_RSA, ret, &ret->ex_data);
184 if ((ret->meth->init != NULL) && !ret->meth->init(ret))
186 #ifndef OPENSSL_NO_ENGINE
188 ENGINE_finish(ret->engine);
190 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_RSA, ret, &ret->ex_data);
197 void RSA_free(RSA *r)
201 if (r == NULL) return;
203 i=CRYPTO_add(&r->references,-1,CRYPTO_LOCK_RSA);
211 fprintf(stderr,"RSA_free, bad reference count\n");
218 #ifndef OPENSSL_NO_ENGINE
220 ENGINE_finish(r->engine);
223 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_RSA, r, &r->ex_data);
225 if (r->n != NULL) BN_clear_free(r->n);
226 if (r->e != NULL) BN_clear_free(r->e);
227 if (r->d != NULL) BN_clear_free(r->d);
228 if (r->p != NULL) BN_clear_free(r->p);
229 if (r->q != NULL) BN_clear_free(r->q);
230 if (r->dmp1 != NULL) BN_clear_free(r->dmp1);
231 if (r->dmq1 != NULL) BN_clear_free(r->dmq1);
232 if (r->iqmp != NULL) BN_clear_free(r->iqmp);
233 if (r->blinding != NULL) BN_BLINDING_free(r->blinding);
234 if (r->bignum_data != NULL) OPENSSL_free_locked(r->bignum_data);
238 int RSA_up_ref(RSA *r)
240 int i = CRYPTO_add(&r->references, 1, CRYPTO_LOCK_RSA);
247 fprintf(stderr, "RSA_up_ref, bad reference count\n");
251 return ((i > 1) ? 1 : 0);
254 int RSA_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func,
255 CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func)
257 return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_RSA, argl, argp,
258 new_func, dup_func, free_func);
261 int RSA_set_ex_data(RSA *r, int idx, void *arg)
263 return(CRYPTO_set_ex_data(&r->ex_data,idx,arg));
266 void *RSA_get_ex_data(const RSA *r, int idx)
268 return(CRYPTO_get_ex_data(&r->ex_data,idx));
271 int RSA_size(const RSA *r)
273 return(BN_num_bytes(r->n));
276 int RSA_public_encrypt(int flen, const unsigned char *from, unsigned char *to,
277 RSA *rsa, int padding)
279 return(rsa->meth->rsa_pub_enc(flen, from, to, rsa, padding));
282 int RSA_private_encrypt(int flen, const unsigned char *from, unsigned char *to,
283 RSA *rsa, int padding)
285 return(rsa->meth->rsa_priv_enc(flen, from, to, rsa, padding));
288 int RSA_private_decrypt(int flen, const unsigned char *from, unsigned char *to,
289 RSA *rsa, int padding)
291 return(rsa->meth->rsa_priv_dec(flen, from, to, rsa, padding));
294 int RSA_public_decrypt(int flen, const unsigned char *from, unsigned char *to,
295 RSA *rsa, int padding)
297 return(rsa->meth->rsa_pub_dec(flen, from, to, rsa, padding));
300 int RSA_flags(const RSA *r)
302 return((r == NULL)?0:r->meth->flags);
305 void RSA_blinding_off(RSA *rsa)
307 if (rsa->blinding != NULL)
309 BN_BLINDING_free(rsa->blinding);
312 rsa->flags &= ~RSA_FLAG_BLINDING;
313 rsa->flags |= RSA_FLAG_NO_BLINDING;
316 int RSA_blinding_on(RSA *rsa, BN_CTX *p_ctx)
324 if ((ctx=BN_CTX_new()) == NULL) goto err;
329 if (rsa->blinding != NULL)
330 BN_BLINDING_free(rsa->blinding);
332 /* NB: similar code appears in setup_blinding (rsa_eay.c);
333 * this should be placed in a new function of its own, but for reasons
334 * of binary compatibility can't */
338 if ((RAND_status() == 0) && rsa->d != NULL && rsa->d->d != NULL)
340 /* if PRNG is not properly seeded, resort to secret exponent as unpredictable seed */
341 RAND_add(rsa->d->d, rsa->d->dmax * sizeof rsa->d->d[0], 0);
342 if (!BN_pseudo_rand_range(A,rsa->n)) goto err;
346 if (!BN_rand_range(A,rsa->n)) goto err;
348 if ((Ai=BN_mod_inverse(NULL,A,rsa->n,ctx)) == NULL) goto err;
350 if (!rsa->meth->bn_mod_exp(A,A,rsa->e,rsa->n,ctx,rsa->_method_mod_n))
352 if ((rsa->blinding=BN_BLINDING_new(A,Ai,rsa->n)) == NULL) goto err;
353 /* to make things thread-safe without excessive locking,
354 * rsa->blinding will be used just by the current thread: */
355 rsa->blinding->thread_id = CRYPTO_thread_id();
356 rsa->flags |= RSA_FLAG_BLINDING;
357 rsa->flags &= ~RSA_FLAG_NO_BLINDING;
362 if (ctx != p_ctx) BN_CTX_free(ctx);
366 int RSA_memory_lock(RSA *r)
370 BIGNUM *bn,**t[6],*b;
373 if (r->d == NULL) return(1);
381 off=k/sizeof(BN_ULONG)+1;
385 if ((p=OPENSSL_malloc_locked((off+j)*sizeof(BN_ULONG))) == NULL)
387 RSAerr(RSA_F_MEMORY_LOCK,ERR_R_MALLOC_FAILURE);
391 ul=(BN_ULONG *)&(p[off]);
396 memcpy((char *)&(bn[i]),(char *)b,sizeof(BIGNUM));
397 bn[i].flags=BN_FLG_STATIC_DATA;
399 memcpy((char *)ul,b->d,sizeof(BN_ULONG)*b->top);
404 /* I should fix this so it can still be done */
405 r->flags&= ~(RSA_FLAG_CACHE_PRIVATE|RSA_FLAG_CACHE_PUBLIC);